Accessible from the File menu, the open and save...
This toggles the display of the map folio tool window.
The map folio allows you to browse your map files and directories. The current directory is displayed in the tool window's caption.
This toggles the display of the location index tool window.
Selecting from the location index causes the map to centre on the chosen location and an 'X' to be displayed on the map (provided that there are no special icons already associated with that location).
Zooming out shows the map at 2/3 scale, zooming in at the normal scale.